<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title></title>
</head>
<body>
	<script type="text/javascript">
		let str1 = "熊大"
		let str2 = "熊二"

		// let str3

		// str3 = str1
		// str1 = str2
		// str2 = str3
		// console.log(str1,str2)
		[str1,str2] = [str2,str1]
	</script>
</body>
</html>